I just picked up a spider ball from Petco on friday for $99. Let him settle over the weekend. Came home from work this evening and he was acting like he was hungry. All I had in the freezer was fuzzys (wasnt really thinking he would eat til this weekend) so I trawed him a couple out and he just finished them both up and is back in his hide. There all different, this one settled in fast. Not all do.
As far as the humidity goes some say to much is bad, some say not enough is bad .The common seems to be 50-60% normal or 70-80% during shed. Thats why a gauge is needed.
It's understandable to want to hold and handle. but resisting will sure make the settling process go a lot quicker. good luck